On Sat, 2 Apr 2016 05:54:57 -0700 (PDT), True North wrote:

John H.
- show quoted text -
"They do not help backing up a trailer, other than to ensure the trailer is still
there!"


Bingo! Maybe Ditzy thinks the cameras have an X-ray option to look through the boat and see what's behind the trailer.

Actually, Don, I wasn't into the name-calling bit.
--

Ban liars, tax cheats, juvenile name-callers, and narcissists...not guns!